麻豆传媒

Luminous, gaseous planetary nebulae expand quickly and die young, when considered in astronomical years. When compact and symmetric, they can appear planet-like through a small telescope.

University of 麻豆传媒 at Mānoa Astronomer Roberto Méndez describes the evolution of understanding and unanswered questions about planetary nebulae in the latest issue of the IfA newsletter .

Scientists believe the ionized gas becomes visible as red giant stars transform into white dwarfs, he writes.

Read Méndez’ article, “.”

The newsletter also has articles on a , and more.